(i) Square side 14 cm gives 4 semicircles of diameter 14 cm; each petal side is a quarter circle of radius 7 cm, totaling 8 x (π x 7 / 2) = 88 cm. (ii) Hexagon side 42 cm gives ...
Discussion Forum Latest Questions
(i) One revolution covers circumference π x d = (22/7) x 56 = 176 cm (1.76 m). (ii) In 10 km (1,000,000 cm), number of revolutions is 1000000 / 176 = 5681.82, or approximately 5682 revolutions.
For statement (i) the velocity will remain the same. For statement (ii) the magnitude of velocity will increase. For statement (iii) the magnitude of velocity will decrease due to opposing acceleration.
The frictional force exerted by the floor is equal in magnitude to F and acts in the direction opposite to motion. Net force is zero because the table moves with a constant velocity.
The impact velocity is 14.14 m s-1, derived from square root of two g h. Total kinetic energy equals 150 J, which divided by 3000 N resistive force gives a sand depression depth of 0.05 m.